One Systems PM4-M V4 - Manual (Page 2)

6. The PM4/M is constructed with 316 grade stainless steel. The
specific selection of banding material will be determined by the
environment. See page 6 for specifics.
NOTE: Caution should be exercised when connecting One Systems Marine
grade products and Marine grade rigging to other metallic, non 316 grade
stainless steel surfaces (dissimilar metals). The potential for galvanic corrosion is
high in marine environments where the One Systems enclosures and rigging are
specified or required. Compatible metals and appropriate anode to cathode area
ratios must be maintained. A structural engineer with galvanic corrosion
experience should be consulted prior to installation of marine grade products, or
ANY One Systems products in marine environments.
CAUTION: All structures outdoors are subjected to wind forces. These forces
must be considered when suspending any product outdoors. It is necessary to
know the “Effective Projected Area” (EPA) of the loudspeaker prior to installation
of the loudspeaker and PM4-M. This data must be supplied to the pole
manufacturer in order to determine safe operation conditions for the loudspeaker
and PM4-M when mounted to a specific pole. See Appendix 1 of this installation
manual for effective projected areas for each enclosure rated for use with the
PM4-M. Periodic inspections of the bracket, loudspeaker enclosure and
installation are highly recommended!
IMPORTANT NOTE: All products in direct weather installations can be subjected
to high wind speeds. For wind speed exposure over 74 miles per hour (119.1
kilometers per hour, 64.3 knots) the loudspeaker enclosure, bracket, banding,
link assembly and any secondary safety must be inspected for signs of damage
or fatigue!
INSTALLATION
The PM4/M consists of three parts: the pole bracket, the loudspeaker bracket,
and the Link. The bracket is designed for pole diameters of a minimum of 10
inches (254mm).
Pole diameters smaller than 10 inches (254 mm) must not be
used. The pole manufacturer MUST be consulted to determine the structural
capacity of the pole. The pole must be able to support the weight of the bracket,
loudspeaker, all associated rigging, and all required safety factors!
NOTE: IF THE POLE BEING USED IS “ULTRA LARGE DIAMETER” WITH
FLAT SECTIONS RATHER THEN A CONTINUOUS CURVE PLEASE
CONSULT ONE SYSTEMS!